Guild Wars 2

gw2 crashes / freezes after 15-30 mins of wvw ever since the april 15th patch

never had any problems with crashes / freezes before. have tried reinstalling the game and using the repair thing but has not helped.

dont have problems with any other games (diablo 3, starcraft 2, LOL, dota 2, borderlands 2, etc…)

I have realized that if I run the game in administrator mode it crashes
If I run the game in regular mode (Non admin) it freezes

latest crash.dmp file is attached (had to change it to txt to attach it because the gw2 forms hate gw2 files apparently)

windows 7 64 bit
intel core i7 2.8ghz
radeon hd 5870 graphics card
16gb ram

all drivers fully updated